# Simple Invoice Studio Pro vs LogNest

The clearest difference is ads: LogNest at none against Simple Invoice Studio Pro's shown. LogNest also leads on update cadence (every 3 days vs every 9 days) and iOS requirement (15.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Simple Invoice Studio Pro sells 2 in-app purchases, starting at $4.99 per month and LogNest sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Simple Invoice Studio Pro ships an update every 9 days, LogNest every 3 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Simple Invoice Studio Pro | LogNest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 3 days** |
| Size | 23 MB | 66 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Taha Tosun](https://appshunter.io/developer/1700318140) | [Daniel Noguera](https://appshunter.io/developer/6789135905) |

## What reviewers say

### Simple Invoice Studio Pro

[App page](https://appshunter.io/ios/app/simple-invoice-studio-pro/id6760261119)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro Yearly New | $34.99 | per year |


### LogNest

[App page](https://appshunter.io/ios/app/lognest-pilot-logbook/id6789135719)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Volara Log Pro Monthly | $4.99 | per month |
| Volara Log Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is Simple Invoice Studio Pro free?

Simple Invoice Studio Pro is free to download, with in-app purchases available.

### Is LogNest free?

LogNest is free to download, with in-app purchases available.

### Do Simple Invoice Studio Pro or LogNest have ads?

Simple Invoice Studio Pro shows ads; LogNest does not.

### Which is updated more often, Simple Invoice Studio Pro or LogNest?

Simple Invoice Studio Pro ships an update every 9 days, and LogNest every 3 days. Most recently, Simple Invoice Studio Pro was updated on October 25, 2026 and LogNest on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*